On personal computers, the key can be used by software in several different ways, such as to switch between multiple login sessions, to terminate a program, or to interrupt a modem connection.

On the Sinclair ZX80 and ZX81 computers, the Break is accessed by pressing Space.

On personal computers and small workstations, the CPU is housed in a single silicon chip called a microprocessor.

On November 2, 1988, Robert Tappan Morris, a Cornell University computer science graduate student, unleashed what became known as the Morris worm, disrupting an estimated 10 % of the computers then on the Internet and prompting the formation of the CERT Coordination Center and Phage mailing list.

On Windows computers, extensions consist of a dot ( period ) at the end of a file name, followed by a few letters to identify the type of file.

On Apple Macintosh computers, there are keyboard shortcuts for the most common diacritics ; Option-e followed by a vowel places an acute accent, Option-u followed by a vowel gives an umlaut, option-c gives a cedilla, etc.

On the Apple II, unlike modern computers that use standardized device drivers to manage device communications, the operating system directly controlled the step motor that moves the floppy drive head, and also directly interpreted the raw data called nibbles read from each track to find the data sectors.

On Atari 8-bit computers, the most common protection method was via " bad sectors ".

On 7 April 1986 Amstrad announced it had bought from Sinclair Research "... the worldwide rights to sell and manufacture all existing and future Sinclair computers and computer products, together with the Sinclair brand name and those intellectual property rights where they relate to computers and computer related products.

On meters that allow interfacing with computers, optical isolation may protect attached equipment against high voltage in the measured circuit.

On modern general purpose computers, this can take tens of seconds and typically involves performing power-on self-test, locating and initializing peripheral devices, and then finding, loading and starting an operating system.

On shared computers, whether time-sharing, batch processing, or server systems, core dumps allow off-line debugging of the operating system, so that the system can go back into operation immediately.

On the other hand, laptop computers offer portability that desktop systems can not due to their small form factor.

On the first computers, with no operating system, every program needed the full hardware specification to run correctly and perform standard tasks, and its own drivers for peripheral devices like printers and punched paper card readers.

On computers and data links using 8-bit bytes this left the top bit of each Byte free for use as a parity, flag bit, or meta data control bit.

On January 12, 2010, Google reported a large cyber attack on its computers and corporate infrastructure that began a month earlier, which included accessing two Gmail accounts and the theft of Google's intellectual property.

On computers running Mac OS X, disk images are now ubiquitous for software downloads, typically downloaded with a web browser.

On personal computers, SLIP has been largely replaced by the Point-to-Point Protocol ( PPP ), which is better engineered, has more features and does not require its IP address configuration to be set before it is established.

On the second day of the contest, when users were allowed to physically interact with the computers ( the prior day permitted only network attacks ), Charlie Miller compromised Mac OS X through an unpatched vulnerability of the PCRE library used by Safari.

On present-day computers, performance is determined more by cache and CPU pipeline considerations than by strict operation counts, and a slight difference in arithmetic cost is unlikely to be significant.

On September 4, 2008, Sony announced a worldwide voluntary product inspection and rework program for TZ-series notebook computers manufactured since June 2007.

On affected Vaio notebook computers, the cooling fan will start to make an unusual noise.

On the other hand, it is argued that as chess enters certain endgames, databases must be employed by computers to deal with added complexities.

On the other hand, free software and proprietary software are opposite traits, and an application can be one or the other but never both, contingent upon the availability of the source code under certain minimum freedoms.

On May 2, 2000, SA was disabled by President of the United States Bill Clinton ; in late 2001 the entity managing the GPS confirmed that they did not intend to enable selective availability ever again.

On a grid with a high penetration of renewables, low spot prices would correspond to times of high availability of wind and / or sunshine.

* On 27 December 2007, Xinwen Lianbo aired a report about the wide and easy availability of explicit content on the internet.

On the other hand, the increase in the availability of silver coin allowed for commerce to expand in numerous ways.

On June 6, 2008, Wizards released the 4th Edition of Dungeons & Dragons, with the retail availability of a new set of core rulebooks.

On 14 June 2010 Ofcom agreed to allow the BBC to limit the full availability of its own and other broadcasters ' high definition ( HD ) Freeview services to receivers that control how HD content can be used.

On November 16, 2010, Apple Inc. launched an extensive advertising campaign that announced the availability of The Beatles ' entire catalog on iTunes.

On January 6, 2009, Apple announced that DRM had been removed from 80 % of the entire music catalog in the U. S. Full iTunes Plus availability was achieved on April 7, 2009 in the U. S., coinciding with the introduction of a three-tiered pricing model ; however, television episodes, many books, and films are still FairPlay-protected.

On February 21, 2012, Vigneron announced a second plan to consolidate churches to address declining membership and clergy availability within the archdiocese.

On a nonbreeding ( August – April ) site in southwestern Arizona, soras were found to use a " mixed shrub community " more than expected based on its availability.

On a pitch pine-dominated site, use of oaks ( primarily bear oak and blackjack oak ( Q. marilandica )) was greater than would be expected in May, but was proportionate to availability in June and July.

On a multinational scale, due to the heterogeneous telecommunication economy and infrastructure before the market penetration of the Internet, management of a VAN Service proved a complicated task leading to the idea of " user defined networks ", a concept preceding the nowadays ubiquitous availability of internet service.

On January 27, 2011 Embarcadero announced the availability of a new Starter Edition which gives independent developers, students and micro businesses a slightly reduced feature set for a price less than a quarter of that of the next-cheapest version.

On August 1st, 2012, Rogers started the availability of an unadvertised tier known as " New Ultimate " which offers 150 Mbit / s of download speed and 10 Mbit / s of upload speed.

On 9 February 2000, after barely eight months in office, Michael resigned in an attempt to avoid a vote of " no confidence " over the availability of Objective 1 funding from the European Union: an issue over which the First Secretary had no control, but which provided a focus for all three other parties to unite in an attempt to destabilize the minority government which he led.

On the other hand, the availability of higher-valued housing in areas belonging to the townships or surrounding villages, which is paid for by workers earning their money within the urban infrastructure also represents a movement of potential tax dollars from Champaign and Urbana to their dependent areas.

On July 15, 2007, Bar decided to end the openMosix project effective March 1, 2008, claiming that " the increasing power and availability of low cost multi-core processors is rapidly making single-system image ( SSI ) clustering less of a factor in computing ".

On July 15, 2007, Bar announced that the openMOSIX project would reach its end of life on March 1, 2008, due to the decreasing need for SSI clustering as low-cost multi-core processors increase in availability.

On 8 July 2010, Linda Robson confirmed on This Morning that a script has been written for a stage show, which all three actresses are keen to be involved with, but this would depend on the availability of Pauline Quirke, who had just been contracted to Emmerdale for 6 months.

On 21 January 2009, Ofcom reported that " The increasing availability of text based services, both broadcast and online may mean that post 2014 there is no longer clear justification for continued intervention to maintain a public service teletext licence.

* On 26-Apr-1991 with the availability of raster scan capability the Gerber format was extended for polygon areas and Extended Mass Parameters, allowing the user to dynamically define apertures of different shapes and sizes as well as planes and polygons without the need for “ painting ”.

On the other hand the effect of artillery, which had perhaps the greatest effect of any military arm in this war, was very much affected by the availability of aerial photography and aerial " spotting ".

On August 18, 2010, months after walking out on the team and indicating he would not play international cricket again, Steve Tikolo has announced his availability for the 2011 World Cup.